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Jignesh.parmar www.electricalnotes.wordpress.com jiguparmar@yahoo.comJignesh.parmar www.electricalnotes.wordpress.com jiguparmar@yahoo.com
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System Voltage415VoltSystem Voltage415Volt
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Phase3 Phase3Phase3 Phase3
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Type of Motor3 Phase InductionType of Motor3 Phase Induction
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Motor Size8HP5.978Motor Size8HP68
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Motor CodeAMotor CodeA
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Motor Efficiency80%Motor Efficiency100%
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Motor RPM750Motor RPM600
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System P.F0.8System P.F0.8
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Application of MotorControl of Restive & Solid State Load with optocoupler IsolationApplication of MotorNon-Inductive or Slightly Inductive ,Resistive Load
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Place of Over Load RelayIn the line (Putting the overload before the motor)Place of Over Load RelayIn the windings (overload is placed after the Winding Split in to main and delta Contactor)0
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Motor Torque / CurrentMotor Starting / Full Load Current
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Motor Rated Tourque (Full Load):56lb-ft
(5252xHp/RPM)
Motor Rated Tourque (Full Load)70lb-ft(5252xHpxRPM)
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Motor Rated Tourque (Full Load):76Nm
(9500xKw/RPM)
Motor Rated Tourque95Nm(9500xKw/RPM)
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Motor Starting Torque:228NmMotor Starting Torque285Nm
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Lock Rotor Current IL(Min):11AmpLock Rotor Current IL(Min):11Amp
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Lock Rotor Current IL(Max):35AmpLock Rotor Current IL(Max):35Amp
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Motor Starting Current :73Amp
(6 to 7 x Full Load Current)
Motor Starting Current :31Amp
(3x Full Load Current)
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Motor Full Load Current (Line):10AmpMotor Full Load Current (Line):10Amp
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Motor Full Load Current (Phase):6AmpMotor Full Load Current (Phase):6Amp
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Fuse (As per NEC 430-52)Fuse (As per NEC 430-52)
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Non-Time Delay Fuse (Max)31Amp(3 x full Load Current )300%Non-Time Delay Fuse (Max)31Amp
(3 x full Load Current )
300%
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Time Delay Fuse (Max)18Amp(1.75 x full Load Current )175%Time Delay Fuse (Max)18Amp
(1.75 x full Load Current )
175%
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Circuit Breaker (As per NEC 430-52)Circuit Breaker (As per NEC 430-52)
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Instantaneous Trip Circuit Breaker (Max)
83Amp(8 x full Load Current )800%Instantaneous Trip Circuit Breaker (Max)83Amp
(8 x full Load Current )
800%
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Inverse Time Circuit Breaker (Max)26Amp(2.5 x full Load Current )250%Inverse Time Circuit Breaker (Max)26Amp
(2.5 x full Load Current )
250%
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Over Load Relay SettingOver Load Relay Setting
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Relay Min (70% of FLC Phase):4AmpRelay Min (70% of FLC Phase):4Amp
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Relay Max (120% of FLC Phase):7AmpRelay Max (120% of FLC Phase):7Amp
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OROR
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Relay Setting (100% of FLC Line):10AmpRelay Setting (58% of FLC Line):6Amp
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ContactorContactor
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Type of Contactor:AC12Type of Contactor:AC1
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Making / Breaking Capacity of Contactor:
62Amp
Making / Breaking Capacity of Contactor:
16Amp
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Main Contactor (100% of FLC Line):10AmpMain Contactor (58% of FLC Line):6Amp
(1/√3 Full Load Current)
(Start,Transition,Running)
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Delta Contactor (58% of FLC Line):6Amp
(1/√3 Full Load Current)
(Running)
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Star Contactor (33% of FLC Line):3Amp
(1/3 Full Load Current)
(Start)
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Time Delay FuseNon-Time Delay FuseInstantaneous TripInverse Time
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Transient Time Delay Setting30msSingle Phase300%175%800%250%
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3 Phase Induction300%175%800%250%
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Synchronous300%175%800%250%
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Wound Rotor150%150%800%150%
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Direct Current150%150%200%150%
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163.313.31
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3.73.7
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4.64.6
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2.940.370.37
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2.952.95
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1 Phase
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3 Phase
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HP
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KW
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Single Phase
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3 Phase Induction
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Synchronous
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Wound Rotor
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Direct Current
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ApplicationContactorMaking Cap
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Non-Inductive or Slightly Inductive ,Resistive LoadAC11.5
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Slip Ring MotorAC24
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Squirrel Cage MotorAC310
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Rapid Start / StopAC412
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Switching of Electrical Discharge LampAC5a3
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Switching of Electrical Incandescent LampAC5b1.5
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Switching of TransformerAC6a12
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Switching of Capacitor BankAC6b12
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Slightly Inductive Load in Household or same type loadAC7a1.5
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Motor Load in Household ApplicationAC7b8
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Hermetic refrigerant Compressor Motor with Manual O/L ResetAC8a6
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Hermetic refrigerant Compressor Motor with Auto O/L ResetAC8b6
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Control of Restive & Solid State Load with optocoupler IsolationAC126
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Control of Restive Load and Solid State with T/C IsolationAC1310
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Control of Small Electro Magnetic Load ( <72VA)AC146
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Control of Small Electro Magnetic Load ( >72VA)AC1510
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In the line (Putting the overload before the motor same as in DOL)
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In the windings (overload is placed after the Winding Split in to main and delta Contactor)
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